GENEVA - The World Health Organization has called an emergency meeting of experts Saturday to consider declaring an international public health emergency over the swine flu outbreak believed to have killed dozens of people in Mexico and sickened at least seven in the U.S.

It is the first time the WHO's Director-General Margaret Chan has convened such a crisis panel since the procedure was created almost two years ago, spokesman Gregory Hartl said.

The committee may decide Saturday that the outbreak constitutes a public health emergency, and if so, whether WHO should consider measures including travel advisories, trade restrictions and border closures.

The global body's flu pandemic alert level is now set to phase three meaning there is no or very limited risk of a new virus spreading from human to human.

The committee "will be asked, 'should we raise the alert level to phase four or phase five,' depending on their appreciation of how far the virus has spread," Hartl said.

At least 62 people have died from severe pneumonia caused by a flu-like illness in Mexico, according to WHO.